/**
 *  Copyright (c) 1997-2013, www.tinygroup.org (luo_guo@icloud.com).
 *
 *  Licensed under the GPL, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.gnu.org/licenses/gpl.html
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.tinygroup.tinysqldsl.selectitem;

import org.tinygroup.tinysqldsl.base.StatementSqlBuilder;

/**
 * 格式化的selectItem
 * 
 * @author renhui
 * 
 */
public class CustomSelectItem implements SelectItem {

	private SelectItem[] items;

	private String format;

	public CustomSelectItem(String format, SelectItem... items) {
		super();
		this.format = format;
		this.items = items;
	}

	public SelectItem[] getItems() {
		return items;
	}

	public String getFormat() {
		return format;
	}

	@Override
	public String toString() {
		return segment();
	}

	private String segment() {
		Object[] args = new Object[items.length];
		for (int i = 0; i < args.length; i++) {
			args[i] = items[i];
		}
		return String.format(format, args);
	}

	public void builderSelectItem(StatementSqlBuilder builder) {
		builder.appendSql(segment());
	}

}
